Siebert Optics - Eyepieces

For Standard A-series 1.3x and Multi Magnification 1.3x / 2x OCAs move down this page to picture #1

IMPORTANT :If you purchased your OCA before February of 2018 these instructions have since been updated and simplified. Revisit them and look for the changes that have been made. They are now explained by Magnification of the OCA instead of model number. Also the #6 cell designation has been dropped and now all cells will be marked #4 and the magnification is also stamped on the cell.

Use the sections below to set up your OCA. In the sections the numbers are the OCA threaded components that connect together. #1 would be the top of the OCA that connects to the binoviewer. The sections will reference pictures and videos that will give visual illustrations.

For 1.25" binoviewers First---Watch these orientation Videos: (Video #1, Video #2, Video #3) Youtube versions >> Video #1, Video #2, Video #3 Number 1# piece or head to attach to the binoiviewer might be different on some binoviewers. The one in the video is for Baader and TV binoviewers direct attach. Universal attachment also available for BW/Chinese and others.

For Elite Binovewers---Watch these orientation Videos: (Video #1, Video #2, Video #3) Youtube versions >> Video #1 and Video #2, Video #3 youtube
#5 ring mentioned in the Video #3 is mistakenly said to be #6

Second ---Look at all the component numbers that make up these OCAs because they all include the same common components. These being Numbers #1,2,3,4,5 although not in that order.

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1.3x OCA for Dobs and refractors.
(Dobs/newt) 1.3x part order = 1-5-2-3-4 (4=optic cell) (#5 is the connecting ring).(See Pictures 1 and 2) And For 1.25" Binoviewers Video #1 Youtube Video #1 For Elite -Video #1) or Video #1 Youtube.

(Refractor) 1.3x=(1- In EP holder)(4-3 - In nose of diagonal) See Pic. 7, 8 For 1.25" binoviewers -Video #2 -Youtube Video #2. For Elite binoviewers Video #2 or Video #2 youtube. For shallow nose diagonals like Baader use Alternative setup (4-5 or 5-4 - In nose of diagonal)First See Pic 10b, 13 or Last See Pics 10, 11, 12 -- #5 is the connecting ring. Exclude other pictures not mentioned.

If a video in the sections

If a video in the sections are refered to as "concept" videos this means that the video is included to give you an idea of the concept of what to do. Use the pictures referenced for exact details and components information of the setup. If the word "Concept" is not used, the video will apply to that exact setup.